Come to think of it , there is one rule in this house , Mary .   What is it ?   When you go out with friends , I don't want you to stay out too late .   Okay .   We maintain a curfew for Cindy because she's just 16 .   How late can we stay out ?   You can stay out till 10 p . m .   But if we're going to be late ?   Then you call me or Tom first . 